Hey! You can indeed reduce the voltage which is routed to them in the software. In the PumpModulation function they are generally set completely ON for a short time. For example:
setPWM(M,’Pumps’,sysItems[item][‘In1’],1.0*float(sysData[M][item][‘ON’]),0)
There is a “1.0*” element in there, which is saying to set the PWM voltage to its full value. You could reduce this somewhat to slow them down, though if you make it too low they won’t have sufficient power to overcome inertia and get spinning.
A more reliable/effective method might be to instead change the period of the PumpModulation function. Currently the pumps activate for a short time each minute; if you changed this to 10 minutes you could get lower dilution rates.
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